The GATE Grind

GATE Electrical Circuits and Machines: Transients and two-port networks – Previous Year Questions

7 GATE previous year questions on Transients and two-port networks (Electrical Circuits and Machines, Instrumentation Engineering) with answers and explanations, from every paper.

  1. GATE 2022 IN Q62 (2 marks, Numerical answer) – The circuit has C 0=10 μF, L 0=1 mH, and an ideal diode. Initially the capacitor is charged to 10 V and inductor current is zero. The switch closes at…
  2. GATE 2023 IN Q47 (2 marks, Numerical answer) – The R–L circuit shown has R=10 kΩ, L=1 mH, and step-current excitation I 0u(t). At t=0-, inductor current is I L=I 0/5. The minimum time for inductor…
  3. GATE 2024 IN Q33 (1 mark, Numerical answer) – The switch shown has been closed for a long time (t<0) and opens at t=0. The initial voltage derivative dv C/dt at t=0+ is V/s (nearest integer).
  4. GATE 2024 IN Q63 (2 marks, Numerical answer) – Two magnetically coupled coils have total inductance 500 mH in series aiding and 300 mH in series opposing. Their self-inductances are equal. The…
  5. GATE 2025 IN Q24 (1 mark, Multiple choice) – Figure (a) is represented by the equivalent T-model in Figure (b). The inductances L 1,L 2,L 3 in the T-model are
  6. GATE 2025 IN Q63 (2 marks, Numerical answer) – In the shown circuit, the switch is opened at t=0. The current i(t) at t=2 ms is mA (rounded to two decimal places).
  7. GATE 2026 IN Q39 (2 marks, Multiple choice) – A two-port network has z-parameters z 11=z 22=10\ and z 12=z 21=5\ . The value of R L such that maximum power is transferred to R L is Ω.